Improvement in lifting-jacks



R. HERMANGE. Lifting-Jacks.

No. 195,927." Patented Oct. 9, 1877.

WITNESSES INVENTEIR M5 firr1m7age N-PETERS PNOTO-LITNOGRAFHER.WASHINQTON. D C.

UNITED STATES PATENT OFFICE.

ROBERT HERMANOE, OF FORT MILLER, NEW YORK.

IM PROVEMENT IN LlFTlNG-JACKS.

Specification forming part of Letters Patent No. 195,927, dated October9, 1877; application filed September 18, 1877.

To all whom 'it may concern:

Be it known that I, ROBERT HERMANCE, of Fort Miller, in the county ofWashington and State of New York, have invented a new and valuableImprovement in Lifting-Jacks; and I do hereby declare that the followingis a full, clear, and exact description of the construction andoperation of the same, reference being had to the annexed drawings,making a part of this specification, and to the letters and figures ofreference marked thereon.

Figure 1 of the drawing is a representation of a side elevation of myinvention. Fig. 2 is a detached view of the fulcrum-pin. Fig. 3 is areverse side elevation of the jack; Fig. 4, a detached view on anenlarged scale of the latch.

This invention has relation to those devices known as lifting-jacks andthe object and purpose thereof are to construct a jack simple in itsparts, and one that maybe easily operated, and, at the same time, admitof being manufactured at a trifling cost.

The invention therefore consists in the general arrangement andcombination of the several parts, as will be hereinafter described, andsubsequently pointed out in the claims.

In the accompanying drawings, A represents the standard, connected to asuitable base, a, said standard being formed with two or more shoulders,I), and holes 0, for the reception of a fulcrum-pin, B. A lever, G, haspivoted thereto a pawl, D, the end of which presses up against theshoulder b when the weight of the carriage-axle bears upon the outer endof the lever. A stop, d, upon the side of the pawl, prevents the samefrom dropping down below the lever, and holds the pawl in place, so thatwhen the weight or pressure of the axle bears upon the end of the leverthe pawl will be brought up against the shoulder upon the standard. Aplate, 0, which is connected to the lever 0, forms a bearing for one endof the pivot f, and has a notch, g, to receive a handle, h, said plateforming a stop for the handle when the latter is used to disengage thepawl D with the shoulder b. The fulcrum-pin B is formed with a suitablehead, i, and hook or ring j, and is connected to the standard A by acord or chain, k. The pin B is formed upon one end with a recess, 1,over and upon which fits a pivoted latch, E, said latch having a recess,m. This latch holds the lever C securely upon the end of the pin, andalso prevents the latter from becoming disconnected with the standardand lever.

It will be seen that by constructing a jack according to my invention avery simple, cheap, and effective device is obtained, and one that iseasily and readily operated.

The standard A may be formed of any suitable material, also the leverand pawl; but, as I desire to cheapen the manufacture of the jack so faras practicable, I prefer constructing them of wood.

Having now fully described my invention, what I claim as new, and desireto secure by Letters Patent, is

1. The standard A and pin B, formed with recess 1, in combination withthe lever G and pivoted latch E, having recess m, substantially as andfor the purpose set forth.

2. The standard A, formed with shoulders b, and the pin B with recessesZ, in combination with the lever G, latch E, pawl D, stop 01,

and handle h, constructed to operate substantially as and for thepurpose specified.

In testimony that I claim the above I have hereunto subscribed my namein the presence of two witnesses.

ROBERT HERMANCE. Witnesses:

O. W. KEEPER, HENRY WAIT.

